High-frequency synchronous boost structure LED driver listed

2018-09-18 15:03:22

Recently, Texas Instruments announced the launch of a TPS61050 LED driver based on a high-frequency synchronous boost structure. It provides a constant current sink to drive a single high-brightness white LED. Inductive fixed-frequency pulse-width modulation (PWM) control technology minimizes input ripple current and meets the requirements of white LED flash in a variety of applications, including camera phones, smart phones, PDAs, and other general-purpose lighting application. This 2 mm x 1.5 mm x 0.625 mm microminiature device is suitable for a variety of small external components, reducing the overall solution size to less than 25 mm2. For more information, please visit: http://focus.TI.com.cn/cn/docs/prod/folders/print/tps61050.html.

TI's TPS61050 chip (IC) uses a 2 MHz switching frequency, allowing the use of a small form factor, low profile 2.2 Î¼H inductor. The TPS61050 device can be used both as a regulated current supply and as a standard boost regulator. This additional mode of operation is useful for powering other high power devices in the system, such as audio power amplifiers or other components that require a supply voltage that is higher than the battery voltage.

For maximum flexibility, the device's LED current or required output voltage can be programmed through an I2C-compatible interface. The TPS61050 also simplifies design by integrating four preset modes of operation. To simplify the synchronization of the flash and camera modules, the device also provides a trigger pin for fast LED start-up time. When the TPS61050 is not operating, the shutdown mode is entered through the I2C-compatible interface, reducing the input current to 0.3 Î¼A. During shutdown, the LED pins are in a high impedance state to avoid leakage currents in the LEDs.

The TPS61050 is available now in volume production and can be ordered through TI's and its distributors worldwide network. The device is available in a 2 mm x 1.5 mm 12-lead chip scale package and a 10-pin QFN package.

Lighting and display solutions

TI offers the broadest portfolio of high performance products to meet today's LED design requirements including power management, such as AC/DC, power factor correction, DC/DC and linear power conversion; RF transceivers; DSP and ultra low Power consumption MCU, etc. TI products support a wide range of applications, including the industry's ultra-small portable display and the largest lighting and display panels. In addition, TI's native support and application expertise can help designers accelerate time-to-market.